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WILLIAM A. TOEEEY, Vo E MONT CLAIR, NEW JERSEY. i

Letters Patent No. 62,164, dated February 19, 1 867.

IMPROVEMENT IN THE MANUFAGTUBE lOl? ELASTIG ROLLS.

To ALL WIIoM IT MAY ooNeEnN: y

Be it known that I, WILLIAM A. TORREY, of Mont 'Claiigvin the county of Essex, andStateof New Jersey, have invented a newA and useful Improvement in the Mode of Constructing Rollers for Wringing Machines and other purposes; and I do hereby declare that the following is a full and `exact description thereof, reference `being had to the accompanying drawings, and the letters of reference marked thereon.

The object of my invention is to overcome'the diiculty heretofore experienced in firmly uniting rollers made of elastic gums to the shafts or spindles on which they are revolved, especially those used in the construction of' wringing machines, and for all other p'urposeswhere elastic rollers are required to be revolved under pressure.` These rollers require a considerable degree of elasticity; and when revolving in Contact with each other under pressure, or against a resisting body, the' parts immediately connected with the shaft or spindle on which they revolve yield suliiciently to loosen their hold, seriously affecting their'eliiciency and durability. i

My improvement consistsin applying to the construction ef these rollers two or more vulcanizable compounds, one of gutta perche, and the other of India rubber, or other vulcanizable elastic gums, cemeuting the former in immediate contact 'with thc shaft or spindle, and forming the body of the roll'er of the latter, and cementing and vulcanizing the two together, ,as hereinafter explained. y To enable others skilled irl-the art to make and 4use my invention, I will proceed to describe its construction and operation. y i

I take a common shaft or spindle, A, made of metal, or o'ther suitable material, of sufficient length to allow the formation of the required roller B, (of which a small portion has been cut olf to exhibit the layer of guttapercha compound,=) leaving suflicient space, C C, between the endsfof the roller and both ends of the shaft or spindle for suitable bearings to connect with a proper framework, and for the attachment of cranks, pulleys,I or other suitable mechanism for revolving it. This shaft or spindle is roughened or serrated on that part of thc surface around which the roller is to bc formed. Around this shaft or spindle I form the roller by'iirst wrapping.

around it a layer of a compound of gutta percha, D, prepared for vulcanizationV in the manner familiarto persons skilled in the art of preparing such gums for that operation, lIirst, however', spreading on the surface of said layer, which Vis to come in immediate contact with the shaft or spindle, a cementcomposed of guttafpercha gum dissolved in naphtha, gasoline, benzine, or their chemical equivalents. This layer of gutta-percha compound. should be at least an eighth of an inch thick but this may und ought to be varied according to the thickness of the India-rubber or elastic compound, so that it should constitute about one-teut`h of the whole body of' the roller. After this layer of gutta-percha compound has been placed in position, I apply thercemcnt above described to its outer surface, and then form the main body of the roller around itof a compound of India,`

rubber, or other vulcanizableelastic gums, prepared, also, for vulcani'ization in the manner well known to persons skilled in the art of compounding and preparing such gums for that operation. This may be either put on in sheets or layers until the required size of the roller is obtained, or it may be put on in one piece of suitable thickness, and the edges cemented together. The whole is then vulcanized on the shaft or spindle by submitting it to the proper degree of hcat,.which, for the ordinary compounds of both gutta percha and India rubber, will be about 250 Fahrenheits'scale. The gutta-pcrcha compound, being of a firmer and'less elastic nature than India rubber, adheres to the shaft or spindle with far greater tenacity than the rubber compound can be made to do; and the rubber compound, through the action of the cement andvulcanizing process, becoming firmly united to the gutta-percha compound, the whole roller is securely and permanently fastened to the shaft o x'- spindle.

What I claim as my invention, and desire to secure by Letters Patent, is i Securing rollers constructed of 4India rubber and other vulcanizablc elastic gums to sliafts or spindlesby th `use and application ofthe -compounds and cement substantially as and for the purposes set forth.

' WILLIAM A. TORREY.

Witnesses:

PETER VAN Ar'rwnnr, DAVID JAcous. 

